236221664 has 144 divisors (see below), whose sum is σ = 584871840. Its totient is φ = 91914240.

The previous prime is 236221633. The next prime is 236221673. The reversal of 236221664 is 466122632.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 236221664.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2654132 + ... + 2654220.

It is an arithmetic number, because the mean of its divisors is an integer number (4061610).

Almost surely, 2^236221664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 236221664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (292435920).

236221664 is an abundant number, since it is smaller than the sum of its proper divisors (348650176).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

236221664 is a wasteful number, since it uses less digits than its factorization.

236221664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181 (or 156 counting only the distinct ones).

The product of its digits is 20736, while the sum is 32.

The square root of 236221664 is about 15369.5043511494. The cubic root of 236221664 is about 618.1680784825.

The spelling of 236221664 in words is "two hundred thirty-six million, two hundred twenty-one thousand, six hundred sixty-four".